WebFeb 17, 2024 · Biotite (av. 3.3%) was found to be more predominant than white mica (av. 2.7%). Biotite is found frequently altered to chlorite (Figure 4c). Of the total framework grains, carbonate makes up approximately 0.18% and chlorite constitutes about 0.46%. The average content of the matrix in sandstone samples is around 1.6%. WebMar 30, 2024 · On the petrographic side, determination of the variations in mineral composition, at least of biotite, chlorite, plagioclase, and muscovite is needed in order to provide more accuracy in determining a chemical composition from the mode. The use of a scanning electron microscope with energy-dispersive X-ray spectra would provide …
Metamorphic Reactions - Tulane University
WebGranitic biotite from southeastern Australia alters to a mixture of chlorite (65%), sphene (10%) and epidote (10%) through a hydrothermal (330–340°C) reaction in which two … WebHydrothermal chlorite replaces igneous biotite in the Gold Hill, Utah, quartz monzonite. Chemical compositions of coexisting biotite and chlorite determined by electron microprobe and wet chemical methods were used to evaluate chemical mass transfer during the alteration process. The mole ratio Mg/(Mg + Fe) varies from 0.52 to 0.65 in the chlorite … dickinson texas high school graduation
The Alteration Mechanism of Copper-bearing Biotite and …
WebJul 9, 2024 · Aspandiar, M.F. & Eggleton, R.A. (2002b) Weathering of chlorite. II. Reactions and products in microsystems controlled by the solution avenues. Clays and Clay Minerals, 50, ... (1983) Chlorite and biotite weathering by fulvic acid solutions in closed and open systems. Candian Journal of Soil Science, 63, 619–629.Google Scholar. WebJan 16, 2024 · Tie line flip reactions involve two phases becoming stable together that were previously unstable together, and vice versa. As with terminal reactions, they may be solid-solid reactions or may involve a fluid phase. An example of a tie-line flip reaction is: chlorite + garnet = biotite + staurolite WebBiotite originated by reaction of chlorite, muscovite and ilmenite, producing rutile, K-feldspar and quartz as subordinate reaction products. Chlorite composition did not change as the reaction progressed but muscovite became depleted in K and (Mg+Fe+Mn) while gaining a little Ti. The composition of biotite produced in the meta-pelites is to ... citrix splitting screen